JP3041420U - Smear head of injection molding machine - Google Patents
Smear head of injection molding machineInfo
- Publication number
- JP3041420U JP3041420U JP1997002231U JP223197U JP3041420U JP 3041420 U JP3041420 U JP 3041420U JP 1997002231 U JP1997002231 U JP 1997002231U JP 223197 U JP223197 U JP 223197U JP 3041420 U JP3041420 U JP 3041420U
- Authority
- JP
- Japan
- Prior art keywords
- screw
- outer diameter
- smear head
- throttle
- head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
(57)【要約】
【課題】 従来のスミヤヘッドは、その構造上絞り部を
スクリュの直径より大きい寸法とせざるを得なく、取付
螺子部が破損しやすかった。また、絞り部のリードは、
スクリュのリードとは連続していないので、逆流防止効
果が低減していた。
【解決手段】 加熱筒先端内孔と同じ角度の円錐部と、
該円錐部に隣接してスクリュ外径と同一の外径とスクリ
ュ外径より短い軸方向長さを有する絞り部と、該絞り部
の外周面に設けた一対または複数対の平行な面取と、ス
クリュに螺着するための取付螺子とを備えたスミヤヘッ
ドを提供するのである。
(57) [Summary] [Problem] In the conventional smear head, the throttle portion is unavoidably sized larger than the diameter of the screw due to its structure, and the mounting screw portion is easily damaged. Also, the lead of the throttle part is
Since it was not continuous with the screw lead, the backflow prevention effect was reduced. SOLUTION: A conical portion having the same angle as the heating cylinder tip inner hole,
A throttle portion having an outer diameter equal to the screw outer diameter and an axial length shorter than the screw outer diameter adjacent to the conical portion, and a pair or a plurality of pairs of parallel chamfers provided on the outer peripheral surface of the throttle portion. Provided is a smear head having a mounting screw for screwing onto a screw.
Description
【０００１】[0001]
射出成形機、特には熱硬化性樹脂用射出成形機のスクリュ先端部に設けるスミ ヤヘッドは、溶融樹脂の滞留を避けつつ逆流を防止し、もって成形の安定を図る ためのものである。本考案はそのスミヤヘッドの改良に関する。 The smear head provided at the tip of the screw of the injection molding machine, particularly the injection molding machine for thermosetting resin, is for preventing backflow while avoiding the retention of the molten resin and for stabilizing the molding. The present invention relates to an improvement of the smear head.
【０００２】[0002]
図２に示すのは従来技術によるスミヤヘッド４であり、加熱筒１に嵌挿するス クリュ２の先端に取付螺子１０により螺着する。スクリュ２先端部の溝深さＤ３ より浅い溝深さＤ２を有し、適宜なピッチのリード１３が設けてある。先端の円 錐部６の側面にはスミヤヘッド４の着脱のための工具掛け用面取１２がある。 FIG. 2 shows a smear head 4 according to the prior art, which is screwed to the tip of a screw 2 fitted in the heating cylinder 1 by a mounting screw 10. The leads 13 having a groove depth D2 shallower than the groove depth D3 at the tip of the screw 2 and having an appropriate pitch are provided. On the side surface of the conical portion 6 at the tip, there is a chamfer 12 for tooling for attaching and detaching the smear head 4.
【０００３】[0003]
上記従来のスミヤヘッド４においては、リード１３を設けるためと逆流防止効 果を高めるため、絞り部８をスクリュ２の直径より大きい比較的長い寸法にせざ るを得なかった。そのため、取付螺子１０の根元には応力が集中し、その部分で 破損する事故が頻発した。 また、絞り部８のスクリュ２に連通する部分ではリード１３は途切れ、スクリ ュ２のリード１４に連続させることは出来ない。そのため、逆流防止効果が低減 する等の問題が生ずる。 In the conventional smear head 4 described above, it is unavoidable that the throttle portion 8 has a relatively long dimension larger than the diameter of the screw 2 in order to provide the lead 13 and enhance the effect of preventing backflow. As a result, stress concentrated on the base of the mounting screw 10, and there were frequent accidents where the stress was broken. In addition, the lead 13 is interrupted at the portion of the narrowed portion 8 that communicates with the screw 2 and cannot be continuous with the lead 14 of the screw 2. Therefore, problems such as a reduction in the backflow prevention effect occur.
【０００４】[0004]
そこで、加熱筒先端内孔と同じ角度の円錐部と、該円錐部に隣接してスクリュ 外径と同一の外径とスクリュ外径より短い軸方向長さを有する絞り部と、該絞り 部の外周面に設けた一対または複数対の平行な面取と、スクリュに螺着するため の取付螺子とを備えた射出成形機のスミヤヘッドを考案したのである。 Therefore, a conical portion having the same angle as the inner bore of the heating cylinder tip, a constricted portion adjacent to the conical portion, having an outer diameter equal to the screw outer diameter and an axial length shorter than the screw outer diameter, and the constricted portion of the constricted portion. The inventor has devised a smear head of an injection molding machine, which is provided with a pair of parallel chamfers or a plurality of pairs of chamfers provided on the outer peripheral surface and a mounting screw for screwing the screw.
【０００５】[0005]
【考案の実施の形態】 図１により本考案の実施の形態を詳細に説明する。 加熱筒１に嵌挿するスクリュ２の先端に取付螺子９により螺着したスミヤヘッ ド３は、先端の円錐部５と、該円錐部５に隣接し滑らかに続く絞り部７と、該絞 り部７とスクリュ２の先端部とを円錐台状に段差なく結ぶ中間部１５と、該スミ ヤヘッドをスクリュ２に螺着する取付螺子９から構成されている。DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described in detail with reference to FIG. The smear head 3 screwed to the tip of the screw 2 to be inserted into the heating cylinder 1 by a mounting screw 9 has a conical portion 5 at the tip, a narrowed portion 7 adjacent to the conical portion 5 and smoothly continuing, and the narrowed portion. 7 and the tip of the screw 2 are connected in a frustoconical shape without a step, and an attachment screw 9 for screwing the smear head to the screw 2.
【０００６】 該円錐部５は、加熱筒１の先端内孔の角度と同一の角度を有する円錐形状であ り、スクリュの射出前進限度位置では該加熱筒先端内孔と僅かな間隙が残るよう に設定されている。The conical portion 5 has a conical shape having the same angle as the angle of the inner bore of the heating cylinder 1, and a slight gap is left between the inner bore of the heating cylinder and the injection advance limit position of the screw. Is set to.
【０００７】 該絞り部７は、スクリュ２のリード１４の外径と同一の外径を有し、該絞り部 ７の外径より短い軸方向長さを有する。該絞り部７の外周面には、一対または複 数対（図１の例は二対）の平行な面取１１を設けて、溶融樹脂の絞り通路として いる。該絞り通路の通路面積は、面取の深さＤ１を種々選択するか、面取１１の 対数を変えることによって、容易に変更し得る。なお、該面取１１は従来のスミ ヤヘッド４における工具掛け用面取１２の用途も兼ねている。The narrowed portion 7 has the same outer diameter as the outer diameter of the lead 14 of the screw 2, and has an axial length shorter than the outer diameter of the narrowed portion 7. A pair of or a plurality of pairs (two pairs in the example of FIG. 1) of parallel chamfers 11 are provided on the outer peripheral surface of the throttle portion 7 to form a molten resin throttle passage. The passage area of the throttle passage can be easily changed by variously selecting the chamfer depth D1 or changing the logarithm of the chamfer 11. The chamfer 11 also serves as the tool-chamfering chamfer 12 in the conventional smear head 4.
【０００８】[0008]
絞り通路の具体的寸法について説明する。型締力２００トンの射出成形機にお いて、直径６０ｍｍのスクリュ用スミヤヘッド３では、面取１１は二対でありＤ １は２．５ｍｍである。これに対し、同一スクリュ径の従来のスミヤヘッド４に おけるＤ２は５ｍｍである。したがって、本考案におけるスミヤヘッドの絞り通 路の通路面積は従来のスミヤヘッドのそれよりはるかに小さく、逆流防止効果が 高いのである。 Specific dimensions of the throttle passage will be described. In an injection molding machine having a mold clamping force of 200 tons, the screw head 3 for screw having a diameter of 60 mm has two pairs of chamfers 11 and D 1 of 2.5 mm. On the other hand, D2 in the conventional smear head 4 having the same screw diameter is 5 mm. Therefore, the passage area of the throttle passage of the smear head in the present invention is much smaller than that of the conventional smear head, and the backflow prevention effect is high.
【０００９】[0009]
このような特徴から、本考案のスミヤヘッドの効果を列記する。 絞り部を短くすることが出来るため、取付螺子部分で破損しにくい。 逆流防止効果が優れ、連続安定成形が可能となる。 面取を、工具掛けと絞り通路とに兼用しているため、構造が簡単となり、リ ード加工もないことから製造コスト低減となる。 絞り通路が複数に分割されるので、溶融樹脂の混練が促進され、均一な成形 品が得られる。 スミヤヘッドの外径がスクリュ径と同一であり、スミヤヘッドの加熱筒内孔 と摺動する部分には、その部分の接触圧力が低くなるので、従来のスミヤヘッド におけるリード表面に発生した創傷を発生し難い。 From these characteristics, the effects of the smear head of the present invention will be listed. Since the throttle part can be shortened, it is difficult to damage the mounting screw part. The backflow prevention effect is excellent and continuous stable molding is possible. Since chamfering is used for both the tool hook and the throttle passage, the structure is simple and there is no lead processing, so the manufacturing cost is reduced. Since the throttle passage is divided into a plurality of parts, the kneading of the molten resin is promoted, and a uniform molded product can be obtained. The outer diameter of the smear head is the same as the screw diameter, and the contact pressure of the part that slides with the heating cylinder inner hole of the smear head is low, so it is difficult to generate a wound on the lead surface of the conventional smear head. .
【図１】ａ）は、本考案のスミヤヘッドをスクリュに装
着し加熱筒に嵌挿した状態の部分断面図であり、ｂ）
は、ａ）におけるＡ−Ａ矢視断面図である。FIG. 1A is a partial cross-sectional view showing a state in which the smear head of the present invention is attached to a screw and fitted into a heating cylinder, and b).
[Fig. 4] is a sectional view taken along line AA in a).
【図２】従来のスミヤヘッドをスクリュに装着し加熱筒
に嵌挿した状態の部分断面図である。FIG. 2 is a partial cross-sectional view of a conventional smear head mounted on a screw and fitted into a heating cylinder.
１ 加熱筒 ２ スクリュ ３、４ スミヤヘッド ５、６ 円錐部 ７、８ 絞り部 ９、１０ 取付螺子 １１ 面取 １２ 工具掛け用面取 １３、１４ リード １５、１６ 中間部 1 Heating Tube 2 Screw 3, 4 Smear Head 5, 6 Cone 7, 8 Drawing 9, 10 Mounting Screw 11 Chamfer 12 Tool Chamfer 13, 14 Lead 15, 16 Middle Part
Claims (1)
該円錐部に隣接してスクリュ外径と同一の外径とスクリ
ュ外径より短い軸方向長さを有する絞り部と、該絞り部
の外周面に設けた一対または複数対の平行な面取と、ス
クリュに螺着するための取付螺子とを備えたことを特徴
とする射出成形機のスミヤヘッド。1. A conical portion having the same angle as the inner bore of the heating cylinder,
A throttle portion having an outer diameter equal to the screw outer diameter and an axial length shorter than the screw outer diameter adjacent to the conical portion, and a pair or a plurality of pairs of parallel chamfers provided on the outer peripheral surface of the throttle portion. A smear head of an injection molding machine, comprising: a mounting screw for screwing onto a screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1997002231U JP3041420U (en) | 1997-03-12 | 1997-03-12 | Smear head of injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1997002231U JP3041420U (en) | 1997-03-12 | 1997-03-12 | Smear head of injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP3041420U true JP3041420U (en) | 1997-09-19 |
Family
ID=43175950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1997002231U Expired - Lifetime JP3041420U (en) | 1997-03-12 | 1997-03-12 | Smear head of injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3041420U (en) |
-
1997
- 1997-03-12 JP JP1997002231U patent/JP3041420U/en not_active Expired - Lifetime
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